Cody

Problems

1 – 21 of 21
Problem Title
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Solvers
Difficulty

Problem 45320. SHA256 Hashing

Created by: David Hill

Tags hash, sha256

1

4

Problem 46627. Output the Montgomery Form of the Input Matrix

Created by: David Hill

Tags montgomery

1

6

Problem 46633. Montgomery Reduction Algorithm (REDC)

Created by: David Hill

Tags montgomery reduction

1

3

Problem 46630. Find R*Rp-N*Np=1 given gcd(R,N)=1

Created by: David Hill

Tags greatest common divisor

1

6

Problem 45242. String to Binary Representation

Created by: David Hill

Tags strings to binary

1

10

Problem 45362. RIPEMD160 Hash

Created by: David Hill

Tags hash, ripemd160

1

6

Problem 44961. RSA decryption

Created by: David Hill

Tags cryptography, rsa decryption

2

4

Problem 44959. RSA encryption using public key

Created by: David Hill

Tags cryptography, rsa encryption

1

4

Problem 46696. Number Theoretic Transform (NTT)

Created by: David Hill

Tags ntt, number theoretic transform

0

2

Problem 45200. Elliptic Curve Cryptography (ECC) Point Addition

Created by: David Hill

Tags elliptic curve cryptography

2

8

Problem 46761. Inverse Number Theoretic Transform (iNTT)

Created by: David Hill

Tags inverse number theoretic transform

0

1

Problem 46636. Montgomery Multiplication

Created by: David Hill

Tags montgomery multiplication

1

2

Problem 44963. Mask Generation Function (MGF1) for PKCS #1 Standard utilizing Optimal Asymmetric Encryption Padding for RSA Cryptography

Created by: David Hill

Tags cryptography, hash, mgf1

1

2

Problem 45243. Binary Array to Hex Representation

Created by: David Hill

Tags binary to hexadecimal

1

7

Problem 44956. Determine RSA keys (public and private) given two prime number character strings (p and q)

Created by: David Hill

Tags cryptography, large integer calculations

1

5

Problem 44964. Optimal Asymmetric Encryption Padding of message for RSA Cryptography

Created by: David Hill

Tags cryptography, rsa, oaep

1

2

Problem 44965. Optimal Asymmetric Encryption Padding decoding of message for RSA Cryptography

Created by: David Hill

Tags cryptography, rsa, optimal asymmetric encryption padding

1

2

Problem 2444. Obtain the Bitcoin address associated to a given private key

Created by: Óscar

Tags bitcoin

1

5

Problem 44924. Create State Array for initiating SHA-3-224 Hash

Created by: David Hill

Tags cryptography, sha-3, hash

0

1

Problem 45213. AES-256 KeyExpansion()

Created by: David Hill

Tags cryptography, advanced encryption standard

0

2

Problem 45211. AES SubBytes() Transformation

Created by: David Hill

Tags cryptography, advanced encryption standard

0

3
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